Citrix released fixes for CVE-2026-107406, a critical NetScaler memory-overflow vulnerability that could enable remote code execution or denial of service in deployments configured for SAML. Organizations operating affected appliances should treat the update as an urgent exposure-management task.
What defenders should do
Identify NetScaler deployments using SAML, apply Citrix’s updates as soon as change controls allow, and review appliance logs for anomalous requests or crashes. Teams should verify external exposure and ensure recovery and monitoring plans cover authentication infrastructure.
Source: The Hacker News.